They may look harmless and smell sweet but disposable vapes can release toxic metals at levels even worse than cigarettes. A UC Davis study found lead, nickel, and antimony inside Is Disposable Vape Safe? Discover the Real Risks A new study from UC Davis found that disposable vapes have much higher concentrations of heavy metals like lead and nickel than traditional cigarettes. CBS Evening News Facebook Years ago, vaping was thought to be a way to stop smoking. However, in the following decades other troubles come from vaping including very high levels of nicotine delivery, battery explosions UC Davis study: Disposable vapes may be more toxic than cigarettes What's inside a vape?